原文：http://www.backtrack-linux.org/wiki/index.php/RFID_Cooking_with_Mifare_Classicroot@bt:~# nfc-mfclassic --help Usage: nfc-mfclassic r|w a|b 
    
      [
     
      ]r|w	- Perform read from (r) or write to (w) card a|b	- Use A or B keys for action 
      
       	- MiFare Dump (MFD) used to write (card to MFD) or (MFD to card)
       
        	- MiFare Dump (MFD) that contain the keys (optional)Or: nfc-mfclassic x 
         
         
           x - Extract payload (data blocks) from MFD 
          
            - MiFare Dump (MFD) that contains wanted payload 
           
             - Binary file where payload will be extracted